I had 3 BFP tests in the last few days.  Today I went to a general doctor to get a blood test to confirm my pregnancy. They surprised me by asking to do a urine test as well. I DRANK A LOT OF WATER in the morning.  My urine at the office was clear and it showed as a Negative test!!! I was so distraught. And the doc  seemed so clueless. I told him I drank a lot of water in the morning. And asked if that could have lowered my HCG level and show a false negative?  He said he didn't know.  WTF?!?